Republican leadership divided over president's rhetoric, with some saying no evidence of election corruption; others urging Trump and his supporters to continue their efforts

Democrat also maintains leads in Arizona and Nevada; President claims election is being stolen, charges fraud, his campaign says 'this election is not over'

Reports say extra squads of agents sent to Biden's campaign headquarters in Wilmington, Delaware; airspace closed in area

Pat Toomey says he sees no proof of 'any widespread corruption or fraud' after president claimed election is being stolen; Adam Kinzinger: Trump's claims 'getting insane'

Incumbent's effort to wrench back Biden’s lead through litigation is a real long shot, though not out of the question

With only about half the votes counted, Democrat believes he can make up ground as mail-in votes are counted

Bannon urged putting the officials' heads 'on pikes' as 'a warning to federal bureaucrats'; Twitter permanently suspends account for 'glorification of violence'

The president's incendiary demand to halt the vote count, and his unsubstantiated charges of fraud, also raise concerns and disturbing echoes in Jerusalem

Incumbent president's threats and attempts to halt initial ballot counting is different from the contested presidential election of 2000, which involved recount of Florida votes

Winner of presidential elections to be decided by four key states, with Biden gaining ground